Abstract: This transparent optical repeater, configured to be embedded onboard a satellite, includes a set of optical fibers, a first optical head, a low-noise optical amplifier, and a polarization separator and controller including a channel polarization separator and controller for each output channel of the band-pass filter. The repeater further include a third high-power optical amplifier per output channel of the polarization separator and controller, an orthogonal polarization combiner configured to recombine the two respective output channels of the two optical multiplexers, and a second optical head configured to transmit the output optical signals of the orthogonal polarization combiner.

Abstract: A method for defining the flexible payload of a telecommunications satellite with low-interference-level beam hopping includes: a first step of defining the capacity from which each beam must benefit on account of the density of exchanges to be delivered by the beam; a second step of determining, depending on the various power-amplifier sharing schemes, the maximum number Pi of beams that an amplifier is able to deliver and the average capacity allocated to each beam; a third step of forming groups of beams, each characterized by the average value of the cumulative capacity of the beams that form it, and determining the number of amplifiers required for each formed group; a fourth step, during which the various beams are distributed between various amplifiers, in such a way that the average value of the load placed on these beams is substantially equal to the average load of the group in question.

Abstract: A telecommunications payload for multibeam satellite coverage, includes at least one antenna and a plurality of sources connected to the antenna in order to deliver a beam corresponding to a spot on the Earth's surface, the satellite comprising a plurality of high-power amplifiers configured so as to supply the sources, wherein the payload also comprises a plurality of ring-shaped routing devices, each ring-shaped routing device comprising Ne input ports, where Ne?2, each input port being connected to one of the high-power amplifiers, and also comprising Ns output ports, each output port being connected firstly to a source, and being able to be connected secondly to at most one input port, and change alternately from a connection state to a disconnection state, each ring-shaped routing device being configured such that, at a time t, Ne output ports out of the Ns output ports are able to be supplied depending on the desired coverage.

Abstract: A telecommunications payload for multibeam satellite coverage, includes at least one antenna and a plurality of sources connected to the antenna in order to deliver a beam corresponding to a spot on the Earth's surface, the satellite comprising a plurality of high-power amplifiers configured so as to supply the sources, wherein the payload also comprises a plurality of ring-shaped routing devices, each ring-shaped routing device comprising Ne input ports, where Ne?2, each input port being connected to one of the high-power amplifiers, and also comprising Ns output ports, each output port being connected firstly to a source, and being able to be connected secondly to at most one input port, and change alternately from a connection state to a disconnection state, each ring-shaped routing device being configured such that, at a time t, Ne output ports out of the Ns output ports are able to be supplied depending on the desired coverage.

Abstract: A satellite multibeam telecommunication system includes at least one satellite provided with at least one high-power amplifier, a digital processor, and means for implementing go channel beam hopping, without return channel beam hopping, the digital processor being configured to digitize the return channel beams and aggregate them, the bandwidth of the return channel beams being proportional to the temporal allocation on the go channel beams.

Abstract: The invention implements: a first step of defining the capacity from which each beam must benefit on account of the density of exchanges to be delivered by said beam; a second step of determining, depending on the various power-amplifier sharing schemes, the maximum number Pi of beams that an amplifier is able to deliver and the average capacity allocated to each beam; a third step of forming groups of beams, each characterized by the average value of the cumulative capacity of the beams that form it, and determining the number of amplifiers required for each formed group; a fourth step, during which the various beams are distributed between various amplifiers, in such a way that the average value of the load placed on these beams is substantially equal to the average load of the group in question.

Abstract: A method, and associated equipment, for dynamically allocating resources in a satellite network comprising at least one satellite configured to form a plurality of satellite beams and terminals, comprises the steps of: clustering the beams into groups of beams, allocating frequency resources to each of the groups of beams, determining geographical zones in which these frequency resources can be used simultaneously, determining a hop frame comprising first timeslots, in which the frequency resources are allocated to the whole set of terminals of one of the beams of the group, and second timeslots, in which the frequency resources are allocated to a subset of terminals of at least one beam of the group, identifying the subset of terminals and allocating to the terminals of the frequency resources, and uploading of information relating to the overall loading of each of the beams.

Abstract: A method, and associated equipment, for dynamically allocating resources in a satellite network comprising at least one satellite configured to form a plurality of satellite beams and terminals, comprises the steps of: clustering the beams into groups of beams, allocating frequency resources to each of the groups of beams, determining geographical zones in which these frequency resources can be used simultaneously, determining a hop frame comprising first timeslots, in which the frequency resources are allocated to the whole set of terminals of one of the beams of the group, and second timeslots, in which the frequency resources are allocated to a subset of terminals of at least one beam of the group, identifying the subset of terminals and allocating to the terminals of the frequency resources, and uploading of information relating to the overall loading of each of the beams.

Abstract: A telecommunication system comprises channels connected to a spot generation device, each spot being able to cover a dedicated user cell. All the channels have an identical bandwidth. The spot generation device comprises channel amplifiers with variable gain and with constant output power dedicated to each channel, the output power levels of all the channel amplifiers being constant and identical, frequency demultiplexers respectively connected to the channel amplifiers and intended to split the bandwidth assigned to each channel into N sub-bands having the same width corresponding to N carriers having different frequencies, a device for selecting and distributing all the carriers between the spots, and frequency combiners respectively dedicated to each spot, the number of carriers assigned to each spot being variable from one spot to another spot according to the needs of the corresponding users.

Abstract: The transmitting and receiving antenna comprises an array of feeds clustered by groups of four adjacent feeds along two directions X, Y of a plane, each feed comprising two transmitting ports and two receiving ports with orthogonal polarizations. For each group of four adjacent feeds, the first, or the second, transmitting ports, respectively the first, or the second, receiving ports, corresponding to a same pair of frequency and polarization values are connected two-by-two in the direction X then two-by-two in the direction Y, the four interconnected transmitting ports forming a transmitting beam and the four interconnected receiving ports forming a receiving beam.

Abstract: A multi-beam antenna comprises an array of feeds illuminating a reflector, the feeds being associated in a plurality of groups. Each feed comprises a polarizer, two diplexers and four ports operating in four different colours. All the feeds belonging to the same group comprise first ports having the same first colour, or second ports having the same second colour, linked together to form a first beam and third ports having the same third colour, or fourth ports having the same fourth colour, linked together to form a second beam.

Abstract: A telecommunication system comprises channels connected to a spot generation device, each spot being able to cover a dedicated user cell. All the channels have an identical bandwidth. The spot generation device comprises channel amplifiers with variable gain and with constant output power dedicated to each channel, the output power levels of all the channel amplifiers being constant and identical, frequency demultiplexers respectively connected to the channel amplifiers and intended to split the bandwidth assigned to each channel into N sub-bands having the same width corresponding to N carriers having different frequencies, a device for selecting and distributing all the carriers between the spots, and frequency combiners respectively dedicated to each spot, the number of carriers assigned to each spot being variable from one spot to another spot according to the needs of the corresponding users.

Abstract: A multi-beam antenna comprises an array of feeds illuminating a reflector, the feeds being associated in a plurality of groups. Each feed comprises a polarizer, two diplexers and four ports operating in four different colours. All the feeds belonging to the same group comprise first ports having the same first colour, or second ports having the same second colour, linked together to form a first beam and third ports having the same third colour, or fourth ports having the same fourth colour, linked together to form a second beam.

Abstract: The transmitting and receiving antenna comprises an array of feeds clustered by groups of four adjacent feeds along two directions X, Y of a plane, each feed comprising two transmitting ports and two receiving ports with orthogonal polarizations. For each group of four adjacent feeds, the first, or the second, transmitting ports, respectively the first, or the second, receiving ports, corresponding to a same pair of frequency and polarization values are connected two-by-two in the direction X then two-by-two in the direction Y, the four interconnected transmitting ports forming a transmitting beam and the four interconnected receiving ports forming a receiving beam.